[PATCH] Auto-load RPC authentication kernel modules (client-side)

[Olaf Kirch <okir@suse.de>]

Summary: Auto-load RPC authentication kernel modules (client-side)

This patch adds a request_module call to rpcauth_create which will try
to auto-load the kernel module for the requested authentication flavor.
For kernels with modular sunrpc, this reduces the admin overhead for
the user.

Signed-off-by: Olaf Kirch <okir@suse.de>

 net/sunrpc/auth.c |   16 ++++++++++++++--
 1 files changed, 14 insertions(+), 2 deletions(-)

Index: build/net/sunrpc/auth.c
===================================================================
--- build.orig/net/sunrpc/auth.c
+++ build/net/sunrpc/auth.c
@@ -64,14 +64,26 @@ rpcauth_create(rpc_authflavor_t pseudofl
 	struct rpc_authops	*ops;
 	u32			flavor = pseudoflavor_to_flavor(pseudoflavor);
 
-	if (flavor >= RPC_AUTH_MAXFLAVOR || !(ops = auth_flavors[flavor]))
-		return ERR_PTR(-EINVAL);
+	auth = ERR_PTR(-EINVAL);
+	if (flavor >= RPC_AUTH_MAXFLAVOR)
+		goto out;
+
+	/* FIXME - auth_flavors[] really needs an rw lock,
+	 * and module refcounting. */
+#ifdef CONFIG_KMOD
+	if ((ops = auth_flavors[flavor]) == NULL)
+		request_module("rpc-auth-%u", flavor);
+#endif
+	if ((ops = auth_flavors[flavor]) == NULL)
+		goto out;
 	auth = ops->create(clnt, pseudoflavor);
 	if (IS_ERR(auth))
 		return auth;
 	if (clnt->cl_auth)
 		rpcauth_destroy(clnt->cl_auth);
 	clnt->cl_auth = auth;
+
+out:
 	return auth;
 }
 
-- 
Olaf Kirch   |  --- o --- Nous sommes du soleil we love when we play
okir@suse.de |    / | \   sol.dhoop.naytheet.ah kin.ir.samse.qurax


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